SwitchFS is a lightweight replacement for UnionFS, RAID and LVM.
SwitchFS (or SFS) is a lightweight file system layer designed to combine file systems located on multiple drives and/or multiple servers into a single logical file repository. SFS is built on top of FUSE (the "filesystem in userspace" layer).
YoutubeFS enables you to browse your favorite Youtube videos locally on your desktop without going to the youtube website. Just create a youtube account and add videos to your playlists, favorites list or subscribe to different channels. YoutubeFS then enables you to automatically load these videos to a local folder on your desktop. You can then view these videos (using a browser) as if they are local files.
Currently YoutubeFS works on Linux (Ubuntu 7.10) and Mac OS (Leopard 10.5.1)
goofs is a userspace filesystem which aims to expose Google services such as picasa images, contacts, blogs, documents, spreadsheets, presentations, etc. It is written using the python binding for fuse together with the python gdata api.
Java bindings for FUSE (Filesystem in USErspace) is a Java API that uses JNI bindings to FUSE library and enables writing Linux filesystems in Java language